A stimulation lead for connecting a pulse generator having a plurality of outputs to electrodes of an electrode array includes a flexible body and the electrode array. The electrode array is distal to the flexible body and the flexible body has a proximal portion and an interface portion. A selection circuit within the interface portion has a plurality of inputs, each input of the selection circuit connected to an output of the pulse generator and a plurality of outputs, each output of the selection circuit being coupled to a respective one of the electrodes of the electrode array. The plurality of outputs of the selection circuit are greater in number than the plurality of outputs of the pulse generator.